<template>
  <div class="register">
    <el-form ref="registerFormRef" :model="registerForm" :rules="registerRules" class="register-form">
      <h3 class="title">{{ title }}</h3>
      <el-form-item prop="username">
        <el-input v-model="registerForm.username" type="text" autocomplete="off" placeholder="账号">
          <svg-icon slot="prefix" icon-class="user" class="el-input__icon input-icon" />
        </el-input>
      </el-form-item>
      <el-form-item prop="password">
        <el-input
          v-model="registerForm.password"
          type="password"
          autocomplete="off"
          placeholder="密码"
          @keyup.enter="handleRegister"
        >
          <svg-icon slot="prefix" icon-class="password" class="el-input__icon input-icon" />
        </el-input>
      </el-form-item>
      <el-form-item prop="confirmPassword">
        <el-input
          v-model="registerForm.confirmPassword"
          type="password"
          autocomplete="off"
          placeholder="确认密码"
          @keyup.enter="handleRegister"
        >
          <svg-icon slot="prefix" icon-class="password" class="el-input__icon input-icon" />
        </el-input>
      </el-form-item>
      <el-form-item prop="code" v-if="captchaEnabled">
        <el-input
          v-model="registerForm.code"
          autocomplete="off"
          placeholder="验证码"
          style="width: 63%"
          @keyup.enter="handleRegister"
        >
          <svg-icon slot="prefix" icon-class="validCode" class="el-input__icon input-icon" />
        </el-input>
        <div class="register-code">
          <img :src="codeUrl" @click="getCode" class="register-code-img"/>
        </div>
      </el-form-item>
      <el-form-item style="width:100%;">
        <el-button
          :loading="loading"
          size="medium"
          type="primary"
          style="width:100%;"
          @click.prevent="handleRegister"
        >
          <span v-if="!loading">注 册</span>
          <span v-else>注 册 中...</span>
        </el-button>
        <div style="float: right;">
          <router-link class="link-type" to="/login">使用已有账户登录</router-link>
        </div>
      </el-form-item>
    </el-form>
    <!--  底部  -->
    <div class="el-register-footer">
      <a style="font-size: 1.5vh;color: black" href="https://beian.miit.gov.cn/">ICP备案/许可证号:沪ICP备2025124030号-3</a>
    </div>
  </div>
</template>

<script setup lang="ts">
import { ref, reactive, onMounted } from 'vue'
import { useRouter } from 'vue-router'
import { ElForm, ElMessage, ElMessageBox } from 'element-plus'
import { getCodeImg, register } from "@/api/login"
import type { FormInstance, FormRules } from 'element-plus'

defineOptions({
  name: "Register"
})

const router = useRouter()

const title = import.meta.env.VITE_APP_TITLE
const codeUrl = ref('')
const loading = ref(false)
const captchaEnabled = ref(true)
const registerFormRef = ref<FormInstance>()

interface RegisterForm {
  username: string
  password: string
  confirmPassword: string
  code: string
  uuid: string
}

const registerForm = reactive<RegisterForm>({
  username: "",
  password: "",
  confirmPassword: "",
  code: "",
  uuid: ""
})

const equalToPassword = (rule: any, value: string, callback: (error?: Error) => void) => {
  if (registerForm.password !== value) {
    callback(new Error("两次输入的密码不一致"))
  } else {
    callback()
  }
}

const registerRules = reactive<FormRules>({
  username: [
    { required: true, trigger: "blur", message: "请输入您的账号" },
    { min: 2, max: 20, message: '用户账号长度必须介于 2 和 20 之间', trigger: 'blur' }
  ],
  password: [
    { required: true, trigger: "blur", message: "请输入您的密码" },
    { min: 5, max: 20, message: "用户密码长度必须介于 5 和 20 之间", trigger: "blur" },
    { pattern: /^[^<>"'|\\]+$/, message: "不能包含非法字符：< > \" ' \\\ |", trigger: "blur" }
  ],
  confirmPassword: [
    { required: true, trigger: "blur", message: "请再次输入您的密码" },
    { required: true, validator: equalToPassword, trigger: "blur" }
  ],
  code: [{ required: true, trigger: "change", message: "请输入验证码" }]
})

const getCode = () => {
  getCodeImg().then(res => {
    captchaEnabled.value = res.captchaEnabled === undefined ? true : res.captchaEnabled
    if (captchaEnabled.value) {
      codeUrl.value = "data:image/gif;base64," + res.img
      registerForm.uuid = res.uuid
    }
  })
}

const handleRegister = () => {
  if (!registerFormRef.value) return
  
  registerFormRef.value.validate((valid) => {
    if (valid) {
      loading.value = true
      register(registerForm).then(res => {
        const username = registerForm.username
        ElMessageBox.alert(`<font color='red'>恭喜你，您的账号 ${username} 注册成功！</font>`, '系统提示', {
          dangerouslyUseHTMLString: true,
          type: 'success'
        }).then(() => {
          router.push("/login")
        }).catch(() => {})
      }).catch(() => {
        loading.value = false
        if (captchaEnabled.value) {
          getCode()
        }
      })
    }
  })
}

onMounted(() => {
  getCode()
})
</script>

<style lang="scss">
.register {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
  background-image: url("../assets/images/login-background.jpg");
  background-size: cover;
}
.title {
  margin: 0px auto 30px auto;
  text-align: center;
  color: #707070;
}

.register-form {
  border-radius: 6px;
  background: #ffffff;
  width: 400px;
  padding: 25px 25px 5px 25px;
  .el-input {
    height: 38px;
    input {
      height: 38px;
    }
  }
  .input-icon {
    height: 39px;
    width: 14px;
    margin-left: 2px;
  }
}
.register-tip {
  font-size: 13px;
  text-align: center;
  color: #bfbfbf;
}
.register-code {
  width: 33%;
  height: 38px;
  float: right;
  img {
    cursor: pointer;
    vertical-align: middle;
  }
}
.el-register-footer {
  height: 40px;
  line-height: 40px;
  position: fixed;
  bottom: 0;
  width: 100%;
  text-align: center;
  color: #fff;
  font-family: Arial;
  font-size: 12px;
  letter-spacing: 1px;
}
.register-code-img {
  height: 38px;
}
</style>